Learn How to Underpromotion: Mate in 2
This chess endgame puzzle highlights a rare but powerful tactical idea: promoting a pawn to a knight instead of a queen. In positions like this, the obvious promotion can be too slow or even fail to deliver the final blow, while an underpromotion creates a direct mating net. The key is to notice when a passed pawn is supported by forcing checks and when the enemy king has no safe squares left.